Process for the preparation of uretdione group containing polyis

Details Process for the preparation of uretdione group containing polyis Process for the preparation of uretdione group containing polyis

1992-07-30

1994-07-12

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483351, C07D22900

Patent

active

053290038

ABSTRACT:
The invention deals with a process for the preparation of uretdione group containing polyisocyanates comprising reacting monomeric aromatic diisocyanates in the presence of a catalyst whereby imidazoles or benzimidazoles having general structure formulas I or II are used as catalysts ##STR1## or their mixtures are used whereby R.sup.1 through R.sup.7 have the meaning cited in claim 1.

REFERENCES:
Rechter, Synthesis, p. 463, 1975.
Noack et al., Z. Chem. 26(1) 117, 1986.

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